okay, after some more reading it appears the clutchnet clutch plates are not good, because they have a smaller diameter. more info here;
http://forums.pelicanparts.com/showthread.php?t=339496&page=2
i've decided to go with a KEP stage2 pressure plate which is good for 600 ft/lb
their stage1 is good for 500 ft/lb
they only have stage 1 and 2, and both are the same price, $550
i'm going to use the 930 clutch disc, which has the same OD but a smaller ID, making for a larger surface area, and a thicker (more) friction material.